> Humans didn't exist. I suspect most current plant/animal species are "devolved" by such swings. The first apes evolved about 20 million years ago, when the w

> Humans didn't exist. I suspect most current plant/animal species are "devolved" by such swings. The first apes evolved about 20 million years ago, when the world was much hotter. I suspect we can survive those conditions again. And regardless of climate change, most current plant/animal species will go extinct (or already have) due to habitat destruction and mass exploitation. As a cause of mass extinction, that's a much bigger problem than climate change.